Re: Botox Injection on vocal cords
Vocal-cord nodules are usually caused by vocal abuse "habits" — If you do nothing to change these habits, cord nodules can last a lifetime, and even can recur after surgical removal. Often, treatment requires modification of voice habits, and referral to a speech therapist may be a good idea.
Resting the vocal cords by allowing little or no speaking for several weeks may permit the nodules to shrink and/or resolve completely.
I would ask the doctor if he recommends speech therapy first. (Unless of course the nodules are a direct result of the hiccup spasms. HAS YOUR FATHER HAS LONG BOUTS OF HICCUPS BEFORE?)
I understand the theory behind botox injections, which is to prevent the use of the vocal cords (completely resting them), thus giving them a chance to "heal".
Botox is probably a "fast" way to achieve this but unless there is some voice re-training by a speech pathologist, (if that indeed is the main cause in your dad's case, and not the hiccup siege) it seems to me that after the Botox wears off, your father's problem might again recur. It won't solve the underlying reason why he developed the nodules in the first place.
The botox idea does make one a little queasy doesn't it? Ask the doc why NOT voice modification therapy first before something invasive like the injection of a TOXIN!?